ENS 40682: Difference between revisions
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| event date = 04/18/2004 12:38 EDT | | event date = 04/18/2004 12:38 EDT | ||
| last update date = 04/18/2004 | | last update date = 04/18/2004 | ||
| title = Auxiliary Feedwater System Actuation Due | | title = Auxiliary Feedwater System Actuation Due to Main Feed Pump Trips | ||
| event text = An Auxiliary Feedwater [AFW] actuation occurred with the plant in Mode 3, Main Feedwater out of service and a cooldown in progress. An AFW actuation was received when both main feed pumps tripped due to low condenser vacuum. AFW was already in service with both motor-driven pumps running and discharge valves throttled to maintain steam generator level. A surveillance to test AFW actuation on the trip of main feedwater pumps was in progress. The main feed pump trip signal was generated when condenser vacuum was broken prior to completing the test and blocking the actuation signal from the main feed pumps to AFW. Steam generator blowdown and sample valves isolated and MDAFW [Motor Driven AFW] discharge valves opened as expected. Operators took action to throttle AFW feed to the steam generators. No adverse affects on the plant occurred. The AFW actuation signal from the trip of main feed pumps has been blocked as allowed by plant conditions. | | event text = An Auxiliary Feedwater [AFW] actuation occurred with the plant in Mode 3, Main Feedwater out of service and a cooldown in progress. An AFW actuation was received when both main feed pumps tripped due to low condenser vacuum. AFW was already in service with both motor-driven pumps running and discharge valves throttled to maintain steam generator level. A surveillance to test AFW actuation on the trip of main feedwater pumps was in progress. The main feed pump trip signal was generated when condenser vacuum was broken prior to completing the test and blocking the actuation signal from the main feed pumps to AFW. Steam generator blowdown and sample valves isolated and MDAFW [Motor Driven AFW] discharge valves opened as expected. Operators took action to throttle AFW feed to the steam generators. No adverse affects on the plant occurred. The AFW actuation signal from the trip of main feed pumps has been blocked as allowed by plant conditions. | ||
The licensee notified the NRC Resident Inspector. | The licensee notified the NRC Resident Inspector. |
Latest revision as of 21:23, 1 March 2018
Where | |
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Vogtle Georgia (NRC Region 2) | |
Reporting | |
10 CFR 50.72(b)(3)(iv)(A), System Actuation | |
Time - Person (Reporting Time:+-1.12 h-0.0467 days <br />-0.00667 weeks <br />-0.00153 months <br />) | |
Opened: | Thomas Petrak 15:31 Apr 18, 2004 |
NRC Officer: | Jamie Heisserer |
Last Updated: | Apr 18, 2004 |
40682 - NRC Website
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